Hadith 1100
Narrated Anas bin Seereen: We went to receive Anas bin Malik when he returned from Sham and met him at a place called 'Ainat- Tamr. I saw him praying riding the donkey, with his face to this direction, i.e. to the left of the Qibla. I said to him, "I have seen you offering the prayer in a direction other than that of the Qibla." He replied, "If I had not seen Allah's Apostle doing it, I would not have done it."
Hadith 2108
Narrated Hakim bin Hizam": The Prophet said, "The buyer and the seller have the option of canceling or confirming the deal unless they separate."
Hadith 4692
Narrated Abu Wail: `Abdullah bin Mas`ud recited "Haita laka (Come you)," and added, "We recite it as we were taught it."
Hadith 6103
Narrated Abu Huraira: Allah's Apostle said, "If a man says to his brother, O Kafir (disbeliever)!' Then surely one of them is such (i.e., a Kafir). "